- ngroups = sizeof(groups_bygid) / sizeof(gid_t);
+ ngroups = NGROUPS_MAX;
+#if defined(HAVE_SYSCONF) && defined(_SC_NGROUPS_MAX)
+ ngroups = MAX(NGROUPS_MAX, sysconf(_SC_NGROUPS_MAX));
+#endif
+
+ groups_bygid = xcalloc(ngroups, sizeof(*groups_bygid));
+ groups_byname = xcalloc(ngroups, sizeof(*groups_byname));
+
if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
logit("getgrouplist: groups list too small");
for (i = 0, j = 0; i < ngroups; i++)
if ((gr = getgrgid(groups_bygid[i])) != NULL)
groups_byname[j++] = xstrdup(gr->gr_name);
if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
logit("getgrouplist: groups list too small");
for (i = 0, j = 0; i < ngroups; i++)
if ((gr = getgrgid(groups_bygid[i])) != NULL)
groups_byname[j++] = xstrdup(gr->gr_name);